Agreed, shading is very inconsistent. Some parts are pillow-shaded, others are just straight gradient from one side to the other. The lines in general are very messy and blocky. However, the pose is interesting (and difficult!) and, well, you get brownie points in general for a voluptuous character. The background definitely looks like it has some promise, too.

Anaaaatomy. :c Studying it will help you go far. I'd recommend veering away from furc ports for now -- try doodling and sketching from references more.